Builder&#39;s hoisting device



Nov. '24, 192s- 1,562,781 F. MOSER BUILDER'S 'HOISTING DEVICE Filed March 26, 1923 4 Sheets-Sheet 1 "Hip I: MT- fx F. MOSER BUILDER'S HOISTING DEVICE Nov. 24

Filed March 26, v1923 I 4 Sheets-Sheet 2 Nov. 24, 1925.

F. MOSER BUILDERS HOISTING' DEVICE Filed March 26, 1923 4 Sheets-Sheet 5 .lnlillill'lllll. vlll llllllll F. MoSER BUILDER "'s notszrms DEVICE- Filed larch 26, 1923 4 Sheets-Shut 4 Patented l iov. 24, l

tlhllTED PATENT QFFIQE.

FRITZ MQSER, F ZOLLIKON, NEAR ZURICH, SWITZERLANDQASSIGNOR TO VIALTER SCI-IINDLER, 0F BERNE, SWITZERLAND.

BUILDERS I-IOIS'IING DEVICE.

Application filed March 26, 1923. Serial No. 627,770.

1/ 0 all whom it may concern Be it known that I, Fnirz Mosnn, a citizen of the Republic of Switzerland, residing at Zoliikon, near Zurich, Switzerland, have invented certain new and useful Improvements in Builders Hoisting Devices, of which the following is a specification, reference being had therein to the accompanying drawing.

Builders hoists adapted to be attached to scaffolds of a building to be erected are known which are provided with a crane, the arrangement being such that according to requiiements either the crane or the hoist may alternately be utilized, the crane and the hoist being operated by the same driv mg motor. Devices of this type present the disadvantage that in addition to the jib of the crane there has tobe a separate structure for mounting the guide rollers or on the jib of the crane there has to be separate guide rollers for the hoist. Therefore either two lijt'ting ropes, one for the crane and the other tor the hoist are required or in case only one rope is Pl'OVidQCl, this rope has to be taken oil one of the lifting devices and to be placed over the rollers of the other lifting device and to be fixed to the latter when a change in the utilization of the devices has to be made. This involves of course a tedious work that takes up much time during which the whole hoisting device cannot be utilized.

This disadvantage is overcome by the subject matter of the present invention, i. e., a hoisting device having guide means for the hoist-cage, above which guide means a swingahle jib oil a crane is so arranged that the same lifting rope running over guide rollers provided on the swingable jib of the crane is used whether the hoisting device is operated as crane or as hoist.

li ith this device a single lifting rope is only required which runs over the jib ot' the crane and carries the hoist-cage or platlorm. The crane may be made ready for use in a very short time by merely unhcoking the from the hoist-cage.

Several constructional. examples of the subject matter of the present invention are illustrated in the accompanying drawings, in which:

Fig. 1 shows in an elevation view the complete hoisting device,

Fi 2 is a plan view of Fig. 1,

Fig. 3 shows a detail on an enlarged scale and Fig. at is a side view of the crane.

Fig. 5 illustrates in a side View a modified design of the hoist-cage.

Fig. 6 shows in an elevation view a second constructional example of the hoisting device.

Fig. 7 is a plan view of Fig. 6.

Fig. 8 is a plan view corresponding to that of Fig. 7 with parts differently arranged.

Fig. 9 shows a third constructional example in elevation and Fig. 10 is a plan View thereof;

Fig. 11 shows a detail and Fig. 12 is a detail modification.

Fig. 13 is an elevation view 01'' the winch.

Fig. li is an elevation view of a detail modification.

Fig. 15 is a plan view of Fig. 1d.

Fig. 16 is a detail on an enlarged scale.

lVith the hoisting device illustrated in Fig. 1, 1 denotes the rigid guide means consisting of several lengths of T-irons lap jointed together by means of straps 11 and having their webs pointing towards each other. These guide means or rails are fixed to the finished outer wallv of a building by means of holding straps 2 and stays 3 and are so arranged that a line passing through the webs of the T-irons (indicated in dotted lines in Fig. 8 of the drawing) is at right angles to the i'ace of the wall. The hoist-cage t moves along the guide rails and is suspended from the lifting rope 5 which runs over the rollers 6 and 7 of the crane 8 and over a guide roller 9 situated at the ground level and is fixed to a winch 1O arranged at the ground level in the interior of the building. The uppermost length of the guide rails which is joined by means of straps 1.1 to the lower length of the guide rails is provided with the holding straps 2 between which a channel-iron 12 (Figs. 2 and 3) is fixed; the web of the channel-iron 12 being slotted over the greater part of its length. A screw bolt 13 with which a nut provided with a handle 1 L co-operates serves to connect the channel-iron 12 to the girder 15 of the structure of the crane. Owing to this arrangement the connection between the upper length of the guide rails and the crane may be effected without it being nec essary to place the crane at a definite level determined by the uppermost length of the guide rails. Upon the height of the building increasing it will be necessary to place the crane at a higher elevation. In order to effect the connection between the crane structure in its new position and the guide rails a new length of rails is inserted below the length of rails carrying the channel-iron 12, the slot in the web of the channel-iron enabling a connection between the guide rails and the crane structure by means of the screw bolt 13. The crane may be utilized independently of the guide rails 1 and of the hoist by simply unhooking the lifting rope from the hoist-cage. As will be seen in Fig. 2 the jib of the crane, when the latter is utilized without the hoist, can be swung through acomparatively large angle, so that a lifted load can easily be set down on the building. Owing to the fact that the crane pillar is arranged at a considerable lateral distance from the guide rails of the hoist, these guide rails do not hinder the hoisting and setting down of loads which require much space. hen the crane is adapted to be utilized for hoisting loads the lifting rope having a hook at its lower end hangs freely from the roller 6, the hool; being at other times in engagement with the hoist-cage.

In order to prevent the load from being hoisted too high or in order to cause the hoisting to be interrupted at a certain elevation an adjustable stop 17 is provided on the lifting rope which knocks against a member 18 mounted on the axle of the lower guide roller 9 and operatively connected to the controlling gear of the winch. This connection consists of a rod 82, a bell-crank lever- 33- (Figs, 1' and 1,3) and control-lever 3d. The latter is operatively connected to a cone coupling one part 3.6 of which is slidably arranged on the; shaft 38 on which the drum 10 of the winch is. lined; the other part 237 of the cone coupling being rigidly fixed to a gear wheel 39 that is rotatably mounted on the drum shaft 38. When the stop 17 knocks against the member 18 the latter is depressed whereby the rod 32' is moved towards the left in Fig. 1, the bell crank lever is turned and causesa' turning movement of the cont-rolling lever about its fulcrum whereby thecone coupling is disengaged and the winch stopped. i denotes the driving belt-pulley of the winch, which pulley is rotated by the electric motor l1.

In the modified construction illustrated in Fig. the hoist-cage is so constructed that the suspension point is situated vertically above the centre of gravity. This is attained by fixing the lifting rope to the end of the part 16 projecting from the rear wall of the cage, and prevents the loa 1 from causing a tilting moment by which the lower guide rolls 17 of the hoist-cage are pressed against the guide rails which would cause increased wear of the latter and a greater moving resistance.

lVith the described arrangement of the hoist-cage the latter is adjacent the front of a building and can be brought into any desired elevation and unloaded there without requiring any special scaffolding or platforms.

The above described constructional example of the builders hoist may advantageously be utilized when erecting large buildings with which the space available for an ranging a hoist is comparatively small. The position of the hoist-cage 'ith regard to the building is however not very favourable, the following constructional examples of builders" hoisting devices present improvements in this respect.

Fig. 6 shows in an elevation view a buil lers hoist erected at the front of a house. It denotes the guide rails of T-section which are so arranged that the plane passing through the webs of both, rails forms an angle of 4:5 with the face of the all. The rails 1 are held together and tired to the wall by means of holding straps or stirrups 2. The platform 4; of the hoist-cage 19 is of a trapezoid shape when seen in plan view. i. e., its outer sides slope at an angle of n towards the parallel sides so that the side adjacent to the face of the wall is parallel to the latter. The pillar 8 of the crane structure is mounted on the foundation. platt- 20 and it can be fixed to the right hand facing 21 of the plate 2-1) as is shown in Fig. 7 or to the left hand facing 21 as is shown in Fig. 8. According to local conditions the hoist may in this manner besituated either to the left or to the right of the crane p llar 8'. When the height of the building increases the guide means are lengthened in the manner described above with the first constructional. example. The arrangement of the lifting rope and ot' the winch is the same as in the first constructional example.

When erecting small buildings such as dwelling houses and the like, it is somewhat tedious and expensive to erect the above described rigid guide mcans. ll ith small buildings the hoisting device according to Figs. P11 is therefore preferably adopted.

the constructionel enanrple the guide rails l. are replaced by a hemp or wire guide rope 21. One end of this rope is fixed to an eyeholt 22 provided in the lower part of the lniilding and the rope is led over an upper guide roller 23 the diameter of which corresgonds to the horizontal distance be tween the guide sleeves 2aof the hoist-cage 19. The other end of the rope is fixed to the drum of a winch 5 on which drum a suitable number of spare-windings of the rope are arranged. The winch 25 is well anchored to the ground, however, the winch might be replaced by any other suitable means for holding the rope end. The upper guide roller is swingably attached to a jib 2-6, the latter being rotatably mounted about a vertical pivot provided in the foundation plate 20 and being fixed in two angular positions one of which indicated in full lines, and the other is indicated by a dotted line in 10. The rope passing through the guide sleeves 24; of the hoist-cage serves as ride means for the latter and it can be tensioned by means of the winch 25. In order to -place the jil' 2b at a higher level and to lengthen the guide means when the erection of the building advances, it is suiticiei'it to unwind a few of the rope wii'idings on the drum of the winch It will be seen in the plan view in Fig. that the crane pillar 8 can be set on either of the two facings 21 of the foundation plate so that the hoist will he to the right or to the left of the crane pillar as has been described above and shown in Figs. 7 and 8, the jib 26 being simply turned from its one extreme position into its other. The oblique sides of the platform of the hoist-cage are provided with looking devices for preventing a lowering of the hoist-cage during the removal. of loads from the latter. The locking device consists of a spring loaded bolt 27 which can be held in its inoperative position and which. when released, projects beyond the oblique side of the plat form and abuts against suitable stops arranged on the building wall. In addition to these locking devices the foundation plate 20 is provided with iirojecting claws 28 cooperating with eyes 29 on the hoist-cage to limit the upward movement of the latter.

This constructional cxaniiple presents the advantage that no supporting elements fixed to the building wall or to scaffolds are required and that the heiggrht of the guide means may easily lre adapted to the advanolug height of building in lengthening the guide rope by unwinding it from the winch. The removal of wheel barrows and similar vehicles from the platform of the hoist-cage to the building facilitated and it requires a minimum of space as one can drive such vehicles from the plfttfol'lll to the wall and along the latter without changing the direction to a large extent.

Instead of a single upper guide roller 23 for the guide rope two small guide rollers 30 mounted in a frame 31 (Fig. 12) may be advantageously used when theplatform of the hoist-cage is large, and when the distance between the guide sleeves is thereby increased. The frame 31 is suspended from the jib 26 in a similar manner as the guide roller 23.

In the constructional example illustrated in Figs. 1416 a crane 8 provided with a jib is shown placed on the top of a building under construction. The winch with the drum 10 for operating the lifting rope 5 is in contradistinction to the other constructional examples attached to the crane. The means for guiding the hoist-cage consists of a rope 21 as in the example illustrated in Figs. 911, which is lead over the pulleys 30. The pulleys 30 are mounted on a h0rizontal part 42 of a structure fixed to a foundation frame 43 to which the crane is secured. The structure comprises two vertical stays a l and 45 on which sleeves 46 and d7 are guided. The sleeves 46 and 47 carry a rod extending in the horizontal direction and forming the axle of a roller L8 and 49 respectively. The frame of the hoist-cage is provided with similar rollers 50 and 51 on which the platform in the shape of a board is loosely placed.

The sleeves 46 and i7 are adjusted on the stays in such a heightas will be found most convenient to remove the loads lifted by the hoist. The lifting of the latter is so adjusted that the rollers 50 and 51 of the hoist cage are at exactly the same level as the rollers L8 and lf) on the structure, when the hoist cage is raised to its uppermost position. In this manner the hoist is conveniently unloaded by sliding the platform on which the load is placed, from the rollers 50, 51 to the rollers 48, ell). According to the nature of the goods and according to the customs of a country the adjustment of the heightof the rollers will have to be carried out as in some cases loads are carried on the head which in other countries are carried on the shoulders. The present structure enables to carry out this adjustment in a very convenient way.

I claim:

'1. A builders hoisting device comprising in coinl'iination, rigid guide means secured to a building being erectech a hoisting cage arranged to travel on said guide means and. a sl wable jib-crane above said guide means arranged to the side of said means, two ropepulleys on said crane maintained in their re lation to one another, and a single rope guided by said pulleys under all conditions of operation, said rope ar 'anged to operate said cage when connected thereto and also operating as a hoist when the crane and its pulleys are swung from said guide means Without changing the angularity of the crane jib.

2. A builders hoisting device comprising in coi'nbination', a rigid Vertical track composed of a pair of guide rails secured to a building a hoisting cage arranged to travel on said track, a sl'ewable jib-crane above said track and arranged to the side thereof, holding. straps for sections of the track, the upper track section having a longitudinally slotted member connected between a pair of such straps, and bolting ineans passing through said slot to bolt said upper section to the crane structure.

In testimony whereof I afiix my signature.

FRITZ MOSER. 

